Averaged and time-dependent characteristics of the motion of an elongated bubble in a vertical pipe

S. Polonsky, D. Barnea, L. Shemer

Research output: Contribution to journalArticlepeer-review

Abstract

The motion of elongated (Taylor) bubbles in air-water vertical flow is studied by processing consecutive series of digitized video images. The shape of the elongated bubbles, as well as the velocities of the liquid-gas interfaces, are measured for various flow conditions. The bubble velocity variation caused by air expansion under the influence of hydrostatic pressure gradient is measured and compared with model predictions. An oscillatory motion of the bubble bottom is observed. The frequency and the amplitude of these oscillations are studied as a function of bubble length and water flow rate. This information is essential for accurate modeling of developing gas-liquid slug flow.

Original languageEnglish
Pages (from-to)795-812
Number of pages18
JournalInternational Journal of Multiphase Flow
Volume25
Issue number5
DOIs
StatePublished - Aug 1999

Keywords

  • Image processing
  • Two-phase slug flow

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